Demographic inferences after a range expansion can be biased: the test case of the blacktip reef shark (Carcharhinus melanopterus).

摘要: The evolutionary history of species is a dynamic process as they modify, expand, and contract their spatial distributions over time. Range expansions (REs) occur through series founder events that are followed by migration among neighboring demes. usually results in structured metapopulations leaves distinct signature the genetic variability species. Explicitly modeling consequences complex demographic such REs computationally very intensive. Here we propose an alternative approach requires less computational effort than comprehensive RE model, but can recover demography undergoing RE, combining spatially explicit modelling with simplified realistic metapopulation models. We examine colonization Carcharhinus melanopterus, abundant reef-associated shark, test case. first used population genomics to statistically confirm occurrence C. identify its origin Indo-Australian Archipelago. Spatial identified two waves stepping-stone colonization: eastward wave moving Pacific westward one Indian Ocean. show models best describe this not accounting for may lead incorrectly interpreting observed variation signals widespread bottlenecks. Our study highlights insights be gained about coupling underscores need cautious interpretation data when advancing conservation priorities.